PEB 4364 T V1.2 Infineon Technologies, PEB 4364 T V1.2 Datasheet - Page 113

• Manufacturer Part Number: PEB 4364 T V1.2
• Description: IC SLIC VOICE ACCESS PDSO-36
• Manufacturer: Infineon Technologies
• Series: DuSLICr

Specifications of PEB 4364 T V1.2

• Function: Dual Channel Subscriber Line Interface Circuit (DuSLIC)
• Interface: IOM-2, PCM
• Number Of Circuits: 2
• Voltage - Supply: 3.3 V ~ 5 V
• Current - Supply: 105mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-PDSO
• Includes: DTMF Generator and Decoder, Line Echo Cancellation (LEC), Teletax (TTX) Generation, Universal Tone Detection (UTD)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEB4364TV1.2XT; SP000007728

I
I
R
Differential Resistance Calculation:
3.8.2.10 Line Resistance Tip/GND and Ring/GND
The DuSLIC offers a choice of modes: either the Tip- or the Ring line or both can be set
to high impedance by setting the bits HIR and HIT in register BCR1 accordingly. While
one of the two lines is set to high impedance, the other line is still active and able to
supply a known voltage. The transversal and/or longitudinal current can be measured
and the line impedance can be calculated.
Because of one line (Tip or Ring) being high impedance, there is only current flowing in
either Tip or Ring line. This causes the calculated current (according
the actual value. Therefore, in either HIR or HIT mode, the calculated current must be
multiplied by a factor of two.
3.8.2.11 Capacitance Measurements
Capacitance measurements with the DuSLIC are accomplished by using the integrated
ramp generator function. The ramp generator is capable of applying a voltage ramp to
the Ring- and Tip line with the flexibility of:
– Programmable slopes from 30 V/s to 2000 V/s
– Programmable start- and stop DC voltage offsets via ring offsets
– Programmable start time of the voltage ramp after enabling the level meter function
Figure 47
slope of the ramp can be programmed (refer to CRAM coefficients). The ring offset
voltages RO1, RO2, and RO3 might be used as start and stop voltages. The ramp starts,
for instance, at RO1 and stops at RO2. The current can be calculated as i(t) =
C
the level meter. To accurately measure values, the integration must start after the current
has settled to a constant value. This can be calculated by the time constant of the ringer
load. It is recommended that the programmable ring generator delay be set higher than
three times the time constant of the ringer load. When there is a resistor in parallel to the
capacitor (for example, leakage), it is recommended to measure symmetrically around
Preliminary Data Sheet
measure normal
measure normal
measure reverse
Measure
=
------------------------------------------------------------------------------------------- -
I
measure normal
*dU/dt, where dU/dt is the slope and i(t) is the current that will be measured by
shows the voltage ramp and the voltage levels at the Ring and Tip line. The
2
–
=
=
I
measure reverse
V
------------------------------------------------
V
–
--------------------------------------------------- -
TR prog
V
TR prog
–
TR prog
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measure reverse
R
R
+
+
V
offset
V
offset
=
2
---------------------------------- -
+
+
I
offset
=
113
I
V
offset
TR prog
R
R
LINE
+
R
PROT
+
R
Operational Description
STAB
Table
DS3, 2003-07-11
22) to be half
DuSLIC